Small percent of product pages have noindex tag, how to fix?

[sjbglx1]

95% percent of my products pages are indexable, but there are still 5% of products have noindex tag like :

<meta name="robots" content="noindex, nofollow" />

I have already checked the html_header.php and everything looks fine.

Can anybody tell me what may cause the problem?

[mc12345678]

There's a number of ways to tag a page to load to not be followed. Understanding some particular characteristic in common with the other pages makes it easier to diagnose. Basically though what might do is at the point where the noindex tag is placed to look at all of the variables that cause that to happen and to do a search on the files for the one(s) that are true to see where they may be set...

Often this might be in the includes/languages/YOUR_TEMPLATE/meta_data.php, by way of a file in includes/modules/pages/PAGE_NAME/ or using an observer that is monitoring the same file(s). But if there are just a few such pages, it would seem that it was on purpose and with a reason, not just haphazard even if a mistake at the moment.